A Multiparameter Pressure–Temperature–Humidity Sensor Based on Mixed Ionic–Electronic Cellulose Aerogels. Issue 8 (7th February 2019)

• Record Type: Journal Article
• Authors: Han, Shaobo; Alvi, Naveed Ul Hassan; Granlöf, Lars; Granberg, Hjalmar; Berggren, Magnus; Fabiano, Simone; Crispin, Xavier
• Is Part Of: Advanced science. Volume 6:Issue 8(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-02-07
• Subjects: aerogels -- ionic–electronic mixed conductors -- multiparameter sensors -- poly(3, 4‐ethylenedioxythiophene) (PEDOT) -- thermoelectric materials; Science -- Periodicals; 505
• DOI: 10.1002/advs.201802128
• Languages: English
• ISSNs: 2198-3844

Abstract

Abstract: Pressure ( P ), temperature ( T ), and humidity ( H ) are physical key parameters of great relevance for various applications such as in distributed diagnostics, robotics, electronic skins, functional clothing, and many other Internet‐of‐Things (IoT) solutions. Previous studies on monitoring and recording these three parameters have focused on the integration of three individual single‐parameter sensors into an electronic circuit, also comprising dedicated sense amplifiers, signal processing, and communication interfaces. To limit complexity in, e.g., multifunctional IoT systems, and thus reducing the manufacturing costs of such sensing/communication outposts, it is desirable to achieve one single‐sensor device that simultaneously or consecutively measures P – T – H without cross‐talks in the sensing functionality. Herein, a novel organic mixed ion–electron conducting aerogel is reported, which can sense P – T – H with minimal cross‐talk between the measured parameters. The exclusive read‐out of the three individual parameters is performed electronically in one single device configuration and is enabled by the use of a novel strategy that combines electronic and ionic Seebeck effect along with mixed ion–electron conduction in an elastic aerogel. The findings promise for multipurpose IoT technology with reduced complexity and production costs, features that are highly anticipated in distributed diagnostics, monitoring, safety, and security applications. Abstract : A mixed ionic–electronic cellulose aerogel is designed, which generates three different electrical signals, independently from each other: one signal sensitive to pressure ( P ) (but not to temperature ( T ) and humidity ( H )), one signal sensitive to T (but not to P and H ), and one signal sensitive to H (without being affected by T and P ).